Sound-box for talking-machines.



W. N..DENNI80N. sounn nox ron 'umm nonnina.'

Annunci nun nl. u, no1.

Patented may 6, 1913.

A TTQRNIY STATES PATENT oEEIcE.

wmsuiuv iv. Dim'msoiv; or

TALKING MOHM COMPAS!) A E, NEWAJEBSEY, ABBIGNOB T0 VICTOR OOBIOMTION OF NEW JERSEY.

seinen-,sox roa'rnxnvxaonmns.

-apseiaeauim t n um rime PatentedMay 6, 1913.

anuncios aise :nur: u, im. semi xo. uam.

N. Damm.-

reneral tol sound y to pneumatic .matic soundbox in which a valveisi provided, the movable member Yof which ispositoned within and veryclose tthe--sound box casing so that the air passing through the valve is caught, or trapped between t e movable'y member and the casing/to cushion or-balance the movable member.

The main objectsl of this' invention are to rovide in a sound box an improved mounting for a stylus bar and a valve Vcarried `jand whereby the valve may b e convenien sound boi'casixig; Hand provenients'as will ppear hereinafter. In the drawings' igu're l. isfalo'ngitudinal section online -1 of Fig. 2 of a sound box constructed in accordance with this .invention; Fig. 2. a fra mentary trontyiew ot the same; Fig. 8 a view on line 8-8 of Fin2; Fi 4 n enlarged sectional view on e4 of ig. 2; Fig. l5` an enlarged sectional view on the lme 5-5 of .Fi 2; Fi 6 an enlarged l'ec.- tional view on ine 6-' of Fi 2; and Fig. l7 a fragmentary back view o a portion` of the device.

Referriii to the drawings, the 'impoved sound box s own, comprisesa casing a substantially cylindrical hollowumain por-V ticngl, the central portion of the back end 'face of which is provided', with a reduced tubular extensi'oi'i'havn a cyliiidricalopem.

in 2 forming'. an inlet t rou [which air`or. o er suitable Huid-is forced ,suitable the sound' box'l A. el

of e mai'i portion 414 'of thev 'iardduced exteriorly in diameter ,and proa'cit-izen ofthe United States,4 and a' in' cludes improvements in that-form of pneu' y and accurately adjustedrto" ro. J vide a. yielding resistance in the path o the" valve and adjustable'froni the qu'tsideof theto y.provide other iiii-4 ongitudu'ial sectional -f For sp 'current'.,in

vided with external screwthreads 3 over which is threaded a cap or cover 4 which forms the front end of thc casing.

For impressing sound waves on a fluid current assing t irough the soun'dbox, there is 'rovi ed a stationary valve seat 5, and n therewith. The valve.

va ve 6 coperatin seat 5, which is pre erably fiat and circular, is securely clamped in positionby and between t he main portion -1 and -the'cap 4 bfi the rcaslng'and is provided centrally with in series of parallel oblong openin s or ports 5. Thevalve 6, which prefera 'ly consists of anormally dat fiexible plate of steel, or other resilient or suitable material, is arrangedbetween the seat 5 and the cap 4 of 'the casing, and is provided with a seriesl of 'parallel oblon 0 -openings or ports forming grid bsrs', w ich are proportioned and ar rantged to cover the ports. 5 in the valve sea 4 lThe. inner face of the cap 4 ie-pr'ovided with an annular recess 7 for the reception ci the valve 6, and the valve 6 is. normally separated from the inner wall 7' of the cap by only a few thousandths o f an inch thereby forming'. achamber 8gbetween the valve ,iid the wall 7 i The cap d is further pro .vided upon its front en'd with a reduced v tubular extension, forming a cylindrical outlet 8 which is iiib ialalinement with the 'va'lve, the cross sectionaliirea of the opening being less than the'area of the valve.

In this .arrangement the openin through thevalve 6 extend on opposite si es of the outlet 8 throu h the cap, and the air after 'passing throng the openings in the valve will enter the chamber 8' between the Vcover and and will en pass out through the opening 8 of the c p.

"the 'valvelt'o cushion or balance the valve the' sound box, there is arranged with the canin 1 and between the valve seat 5 and thb in et 2 .a .conical deiiectcr or spreader p which taperstow'ard the inlet 2 coaxia'llv therewith, the marginal edge of I.the detidtorlbeng spaced from the inner surface ot'the'oasing to provide an annular vpassage ybetween the edge of thespreader .and tli'eeasin' aced between the spreaderB and e 'va ve seat 5. is a reticulate'dnor. ,foraminotie diaphragm 10, preferablv of closely woven si k or other ta ric1 eading and distributing the fluidA 4 which acts to iilter'the -iiuidreceived from ."valve carried thereby, a' torsional sprin 'bar which will hold the bar and'valve carried -oscillution,.th`e torsional sprlnglbar' 17 is ywith equal velocitic'srs,l

l l Lwith ay sound record, the-valveisparried 1o" -valve being rigidly secured to the bar by the spreader and to equalize its rassure, and diffuse theuid equally throug vout the chamber 11 between the diaphra andthe valve' scat' 5, .so kthat .thefiiui will Ipass through the several'ports 'ofl the'jvalve seat For oscillating'the vlilve'y in accordance s stylus bery 12, the -lower portion ofthe in eans of a .screw` lllsind steady 'or guide p1ns14,.'undthe stylus bar is prcferabl cut away, as'at 15, to receive the valve, an the valve seat 5 is rovided' with aireeess 16 for the reception o the heado'f the screw 1B.

Forsupporting .the stylus ber and theor pivot 17 extends adjustably throu an opening 18- in'fthe stylus bar. An o lique kerf 19 is provided between the opening'18 through the et lus bar and the'cut out portion 15 o f the sr,- and screws 20 pass freely through suitable transverse `openings-21 o! the main portion ofthe stylus bar and are rough the ortion 12' separated clamped to the torsional spring, the bar ing adjustable rotatively with respect tosnd lon 'tudinally of the sprin as shown in Figs. '5-6 To provi e a -mountmg'ior the stylus bar thereby u o n s substantially fixed axis, but which permit Tof the proper freedom of preferably tubular in' form'and .made of steelor other resilient material. Thel ends of the tubular ring 17 are' rigidly'mounted in bearing'bloc 422 -which' are 's'djust'ably mounted-.on th'eifaceof the valve 'seat 5 as hereinafter described, and the spri'n is 'prefersbly weakenedfupon each side oft e stylusI bar by bein provided with an externnl an`` nulsr recess tween the stylus berend each bearing block. Y

To provide space for the up r portion of the stylus bar and for the pa upon which the bar is mounted, the inner wall of the cup 4 is recessed as at 4the recess be' no larger than is actually' required vfor the purpose. This provides s. space for 'the recep-v tionof those parts of the device that pro- Lect from the valve in the direction ofthe elancing or cushioning chamber. 8' without nisterially incressin the' effective size of the balancing cham r, and therefore without d ecreasin the balsncin efect.

For adjusting t e axis of esci ation of the valve toward or away from the plane o! its seat, each of the blocks y22'supipcrti1i the stylus bnr is providcd-at oliyend, with sc knife edge 28 ed ina knife edge groovev 24de the c vslvsiiest;l An

1n thgou h the valve seat from the back thereofan the inner end of the screw engages a ainst the rear face of the bearing block. A ov inserted from the back of the ,valve seat and extending loosely therethrough is a clam ing screw 25 for each block, this Screw ing threaded ns at 26, into the frontportion 22' of the block and assing freely Athrough the rear portion 22 of the block, the lower end of the block being divided into the two portions 22' and 22 byl the. longitudinal kerf 27.

v By roperly adjusting the screws 24 and then c amping the bloc s 22 upon the knife edges 23 and upon the ends of the screws 24 by means of the screws 25 the bearing blocks hre held rigidly against the valve seat. By this construction it is evident that the axis vof oscillation of the stylus bar-and valve carried therebycan be readily adjusted toward o r away from the valve seat -whereby the valve may be adjusted to rest normally squarely upon the seat, which is a very desirable result.

` To clamp the torsional sprin 17 within the openings 28 in the journri .blocks 22, each block is provided with a screw 29 passingjreely through the front ortion 22 of the block in front of the kerf 297, und threaded into the rtion 22 of the block u on the other si e of the kerf 27 whereby w ieu the screw' 20 is tightened the two portions of 'the block are forced toward each other and are clam ed rigidly upon the torsional spring. he lower end of the stylus bar projects outwardly through the recess 4 which opens through the side of the cap 4 of the casing, and is provided with the usual socket 30 for holding a stylus, the stylus bcingclamped in tls socket by the usual set screw 31 or other suitable means. For yieldingly restraining the oscillations :ofy the valve there projects outwardly through an opening 32 in he frontend of the csp 4 a screw 8 the inner end of which passes loosely through a suitable opening in he u per end of the valve and is 'threaded into t e valve seat 5. VAn elastic bushing or washer 84 is mounted upon the screw between the head thereof und the front of thc valve. The (pressure upon the elasticwnsher 34 may be a justed by the adjustment of the screw in the ynlve seat whereby the vnlvc may be held yieldingly a ninst its seat under a rcdetermined adjusts lc tension.

n the operation of this device, with a substantially uniform pressure of nir in the chalnber 11 the tensioning screw 83' mi ht be dis need with, and theynlve nllcwe to -oscilla e4 freely upon its spring 17, but since ,the pressure of the air in thechamber 11 generell varies and may be greater than is absolute y necessary for the operation of the screw 24' for'each block is threaded lll) ber 11 forces t 0 Although this invention has been described as embodied in a pneumatic sound box, it is obvious that some of the features of the invention might be used in other forms of sound boxes or in other devices.

For instance the im roved mounting for the stylus b'ar might c used in connection 'with any well known form of sound box having a diaphragm'instead of a valve. VTherefore when the term sound box is used it is intended to cover any form of sound reproducing -r'neans to which this inventiontmight -be applied. Moreover, the term a mountin foisaid bar and similar terms 'nthe claims`are intended to cover .either a mounting for a stylus bar or a mounting for asound re ijoduc'ing valve, or anyl other movable mem r. Furthermore, lt ough onl one form in which this invention may embodied is described herein,many chanes might be made in the construction set orth without departing from thespirit of this invention or the scope of the appended claims.

Having thus fully described-the invention I claim and desir-esto protect by Letters Pat' ent of the United Statesi:

1. In a sound box,l the combination with ,a valve seat,-of a valve mounted to oscil late with res t to said seat,` a st lus oo nnected to said valve, and means adjgst.

' the position lof the axis of said lvalvef toward .and away from said seat. i,

2. In asound box, .the combination with a exible valve, 01,9. stylus .bar on whic said valve is mounted a torsional spring forming a pivot for said bar, and laterally adjustable -means to clamp said bar to said sprin i 3. ign a sound box, the combination with a st lus bar, of a torsionalspring on'which sai bar is mounted, mountings for said spring, laterally adjustable means to clamp said mountings to said spring, and means to adustably clamp said bar to said spring;

4. n a sound box, the combination wit a relative stationary member, ofa -styl'us bar, a' torsionslispring upon which said stylus bar isadjustable, clamping blocks for said-s ring, means to adjust said blocks' `lateral y with respect tosaid stationary ibiiember, and a valve mounted on said stylus ar. 5. InA-a sound box; the-combination with a stationary member, of a stylus bar, a torsional spring u on which said bar is adjustably mounted, locks for said spring secured to said stationary member, means to adjust said spring laterally with respect to .said stationary. mem r, and a flexible valve mounted on th` inner end of said stylus bar.

6. In a sound box, the combination with a relatively stationary member, of a valve, a pivotedstylus bar on which said valve is mounted', journal blocks for said bar, each of said 'blocks being provided at one end with a knife edge enga ing in a groove royided therefor in 'sai stationar mem r, adjusting screws passing throu. said st ationary member and engaging t e oppositi-l ends of said blocks respectively, means to .,a re atively stationary secure said blocks to said .stationary member, and means to adjustably clamp said stylus bar to said blocks.

7. In a sound box, the combination with a valve sea of a valve-coperating therewith, laters 1y adjustable means to 'cause saidrvalve to rest squarely upon said seat when said 'sound box is inoperative, and means to o'scillats said valve in accordance withsound waves. I

8.In a sound box, the combination with a valve seat, of a flexible valve, a pivoted .stylus 4bar to which said valve is secured, and means to adjust the 4pivot of said bar toward .and away from said seat, to cause .5

said valve to rest squarely on said seat. 9. In asound boxt,he combination with s valveseat,'o'f a pivot'ed valve, a casing within which said valve is mounted, means adjustable from the outside of said casing for holding one end-of said valve yieldingly against said seat, and means for vibrating 'saidlvalve in accordance with sound waves. 10, In a sound box, the combination with 'a ca provided with a stylus bar recess, of valve formin with said cap a valve chamber, a. valve icated within said chamber a stylus bar secured to one end of said va ve and. located within and substantially filling said st lus.bar recess, said cap being also provi ed with-ao opening adjacent the opposite end of said valve and adjustable yielding'means substantially filling said opening and actingr to force the latter and o sai valve against. said seat.

11. In a sound boit,` the combination with a casing, of a valve seat ad'acent one side of said casin and forming t erewit-h a balancing cham r, a valve within said chamber, a stylus bar secured to said valve, and blocks inwhich said stylus bar is pivoted. said casingbbeing rovided with a recessed rtion su v ar and said blocks.

stantia ly filled by said stylus A12'. In a sound box, the combination with l a valve,seat,of a valve mounted to oscillare in accordance with Bound waves with rc.

. adjust the4 a substantially flat valve seat, of a valve.

mounted to oscllate about an axis substan-4 tially parallel lto said scat, and in accordance with sound waves, and means to adjust the position of said axis laterally.

14. In a sound box, the combination with a valve seat, of a vaive mounted to oscillate with respect thereto inaccordance with waves, and means to adjust said valve sound longitudinally of its axisof oscillation.V

15. In a sound box, the' combination with a valve mounted to vibrate in accordance' with sound waves, of a' casing iiiclosing said valve, und means adjustable from without said casing for limiting the 'extent of vibration of said'valve.

16. In a sound box, the combination with a valve mounted to vibrate in accordance with sound waves,.of a casing inclosing said valve, and yielding means adjustable from without said casing for limiting the extent of vibration of said valve. 17. In a sound box, the combination with a valve seat, of a valve mounted to vibrate with respect to said seat in accordance with4 sound waves, a longitudinally adjustable member extending through said easing and into said seat, and yielding meansb'etween said member and said v slveto restrain the movement of-said valve. r y

18. In a sound box, the combination with al stylus bar, of a mounting tliereforlcoinprising a pair of blocks rotatably mounted on knife e es on the same axis means to end of each bloclt with reect to said axis, and a rod eonnectingsaid b ocks and said bar. i

'19. In a sound box, the combination with a-st lus bar, of a tubular torsional s ring xe intermediate .of its ends to sai bar. and means holding the ends only of said spring in fixed osition.

20. In a soun 'box the combination with a st lus bar, of a tubular torsional s ring fixe intermediate of its ends to sai bar, and means to hold the ends of said spring in fixed position, said bar vbeing adjustable g2. In a sound box, the combination with a valve mounted to vibrate in accordance with sound waves, of av casing inclosin'g said valyenand means coperatin casing witheaid valve, anda justable from within laid mesma.

resistance-to the vibration of said valve,

28.111 a sound box, the combination with a movable sound reproducing member, of a mounting therefor, comprising a pair of blocks rotatably ymounted upon the same axis meins to adjust the free end of each :bloei: with respect to said axisy and means connecting said blocks and said movable member.l

' 24, In a sound box, the combination with a movable sound reproducing member, of a vtubular toisional s ring fixed intermediate of its ends to sai movable member, and means to hold the ends of said tubular member in fixed position, said tubular member being weakened between one end and said movable member.

25'. In a soundbox, the combination with a movable sound reproducing member, of'a mounting therefor comprisin a tubular spring said 'spring being wea ened inter- 'mediate of its ends.

26. In a sound box, the combination with :a movable sound reproducing member, of a mounting therefor, comprising a tubular yielding member, said tubular member being `provided with an annular recess to weaken the same.

27. In a sound bx, the combination with :a 'fixed valve member, of a movable valve member mounted to oscillate with respect rthereto. in accordance with sound waves. and means to adjust the position of the axis of 'fixed member.

28. In a sound box, tlie combination with in. valve seat of a i'noi'fpble member mounted 'to oscillate adjacent one side of said seat in accordance with sound waves, and means adjustable from the othea` side of said seat for adjusting the axis of said movable'meinber Awith respect to said seat.

20. In a sound box, the combination with ,a val've seat,^of a movable member mounted to oscillate adjacent one side of said seat in v,accordance with sound waves and means extending through said seat and adjustable from t eotlier side thereof for adjusting the ,axis of said movable member.

80. In a sound box, the combination with a valve seat of a movable sound reproducing valve u on one side of said seat, a mounting for sai 'valve comprising a block upon one side of said seat, a screw threaded through said seat from the other side thereof and resting against said block, and a screw passing freely'tlirough said seat and threaded into said block said block being adjustable fby means of said screws f'to change the position of the said movable member.

81. .In a soundbox, the combination with a exi'ble sound rsproduein valve, mounted to olcrllate, of a casing in seing said valve,

l .without said casing, for applying a yieldingY ,said movable member with respect to said i late on an aXis,.a casing inclosing said valve,

f substantially perpendicular to said seat.

' casing for counterbalancing pressure on the justable axis.

, tween said bar and each of said supports.

aridemeans adjustable .fromthe outside of 'mounted to oscillate-f in .accordance with man said casing for applying a pressure adjacent to the free'end of said valve. j 1 32. In a sound boX, the combination with a substantially flat valve seat of a iexible sound reproducing valve mounted to oscilyielding means adjustable from the outsideV of Vsaid casing for applying a pressure to 'the free end of said valve, and in a direction 33. In a sound'box, the combination of a casing, a 'valve seat therein provided with a port, a valve for opening and closing said port in accordance with sound waves, and means coperatin Within said casing with saidvalve, and a justable from outside said innerside of said valve.

34. In a sound box, the combination with a st lus bar provided with an Vaperture exten ing therethrough and a kerf extending from said aperture, means extending through said aperture to support said bar, and means for drawing the sides of said kerf together to clamp sald stylus bar on said supporting means. l

35. In a sound b ox, the combination with a torsional support, of a stylus bar rigidly mounted thereon, anda pair of split blocks clamped on said support for supporting the sam 36? In a sound box the combination with a valve seat, oi'movable valve, member sound waves adjacent" said seat upon an ad` 37, In a soundlb'ox, the combination with va pair of fixed supports, of a stylus bar between said supports, and yielding means connectin sald bar to said'supports, said means bemg reduced 1n `cross section be- -38. In a sound box, the combination with a pair of fixed supports, of a stylus bar heconnecting sai barA tq'said supports; said tube being reduced in4` cross s ectln between said bar and each of said supports.

39. In a sound box, the oolnbiruitionla member forming a valve seht, f movable l sound reproducing member` mounted tu 'late with respect to said seat, and. meanxto` adjust the position of said movable member` in a direction substantially parallel said seat.

40. In a sound box, the combination with a valve seat, of a' movable valve member arranged to coperate with said seat to re'- produce sounds, and adjustable in a. direc tion substantiall parallel'to said Seat.. 41. In a sound7 box, the combination with a valve seat, of a valve member arranged to be moved toward and away from said seat Ato reproduce sounds, and adjustable in a 'direction substantially parallel to Asaid seat.

42. A stylus lever for talking machine reproducers having an openin therein toreceive pivoting means, sai lever being' formed Awith resiliently connected portions on opposite sides of said openingaclapted to snugly incase said said openlng.

43. A stylus lever for talking machineI reproducersv having anl openingy formed therein to receive ing a slot or ker therein communicating vwith said opening.

44. A stylus lever Vfor reproducers having an opening therein to receive' pivoting means and having a kei-f orslot intersecting said o enin and. ex,- tending. tothe peripher oV the ever., v

my hand'this 22nd day of January A. D.,

j WILBURN N. DEN NISON. Y Witnesses:

HARRY Conn' KENNEDY, ALsToN B. MoULTo.

upon the application of Wilburn N. Dennison, of Merchantville,

improvement in Sound-Boxes for Talking-Machines,

printed specification requiring correction as f relative read relaz'peby; and that the said New Jersey, follan, an error appears in "the follows: Page 3, line "56, folthe Word v Letters Patent should beread with this correction therein that the same may conform to the record of the case in the Patent Oliice. j y l Signed and sealed this 3rd day of June, A.

[sean] pivoting means and havtalking machine pivoting means Within K In Witness whereof have hereunto set 8i i late on an aXis,.a casing inclosing said valve,

f substantially perpendicular to said seat.

' casing for counterbalancing pressure on the justable axis.

, tween said bar and each of said supports.

aridemeans adjustable .fromthe outside of 'mounted to oscillate-f in .accordance with man said casing for applying a pressure adjacent to the free'end of said valve. j 1 32. In a sound boX, the combination with a substantially flat valve seat of a iexible sound reproducing valve mounted to oscilyielding means adjustable from the outsideV of Vsaid casing for applying a pressure to 'the free end of said valve, and in a direction 33. In a sound'box, the combination of a casing, a 'valve seat therein provided with a port, a valve for opening and closing said port in accordance with sound waves, and means coperatin Within said casing with saidvalve, and a justable from outside said innerside of said valve.

34. In a sound box, the combination with a st lus bar provided with an Vaperture exten ing therethrough and a kerf extending from said aperture, means extending through said aperture to support said bar, and means for drawing the sides of said kerf together to clamp sald stylus bar on said supporting means. l

35. In a sound b ox, the combination with a torsional support, of a stylus bar rigidly mounted thereon, anda pair of split blocks clamped on said support for supporting the sam 36? In a sound box the combination with a valve seat, oi'movable valve, member sound waves adjacent" said seat upon an ad` 37, In a soundlb'ox, the combination with va pair of fixed supports, of a stylus bar between said supports, and yielding means connectin sald bar to said'supports, said means bemg reduced 1n `cross section be- -38. In a sound box, the combination with a pair of fixed supports, of a stylus bar heconnecting sai barA tq'said supports; said tube being reduced in4` cross s ectln between said bar and each of said supports.

39. In a sound box, the oolnbiruitionla member forming a valve seht, f movable l sound reproducing member` mounted tu 'late with respect to said seat, and. meanxto` adjust the position of said movable member` in a direction substantially parallel said seat.

40. In a sound box, the combination with a valve seat, of a' movable valve member arranged to coperate with said seat to re'- produce sounds, and adjustable in a. direc tion substantiall parallel'to said Seat.. 41. In a sound7 box, the combination with a valve seat, of a valve member arranged to be moved toward and away from said seat Ato reproduce sounds, and adjustable in a 'direction substantially parallel to Asaid seat.

42. A stylus lever for talking machine reproducers having an openin therein toreceive pivoting means, sai lever being' formed Awith resiliently connected portions on opposite sides of said openingaclapted to snugly incase said said openlng.

43. A stylus lever for talking machineI reproducersv having anl openingy formed therein to receive ing a slot or ker therein communicating vwith said opening.

44. A stylus lever Vfor reproducers having an opening therein to receive' pivoting means and having a kei-f orslot intersecting said o enin and. ex,- tending. tothe peripher oV the ever., v

my hand'this 22nd day of January A. D.,

j WILBURN N. DEN NISON. Y Witnesses:

HARRY Conn' KENNEDY, ALsToN B. MoULTo.

upon the application of Wilburn N. Dennison, of Merchantville,

improvement in Sound-Boxes for Talking-Machines,

printed specification requiring correction as f relative read relaz'peby; and that the said New Jersey, follan, an error appears in "the follows: Page 3, line "56, folthe Word v Letters Patent should beread with this correction therein that the same may conform to the record of the case in the Patent Oliice. j y l Signed and sealed this 3rd day of June, A.

[sean] pivoting means and havtalking machine pivoting means Within K In Witness whereof have hereunto set 8i 

